CN111902600A

CN111902600A - Device for covering a sliding or movable lifting/sliding wing of a window or door

Info

Publication number: CN111902600A
Application number: CN201980011964.7A
Authority: CN
Inventors: 沃尔夫冈·贝伦斯; 马丁·雅各布
Original assignee: Siegenia Aubi KG
Current assignee: Siegenia Aubi KG
Priority date: 2018-02-27
Filing date: 2019-02-19
Publication date: 2020-11-06
Anticipated expiration: 2039-02-19
Also published as: DK3759301T3; EP3759301B1; WO2019166264A1; DE202018001040U1; CN111902600B; KR20200125953A; RU2020126464A; EP3759301A1

Abstract

Device for covering a first sash frame (8) of a sliding sash (7) or a movable lifting/pushing sash as a window or door (1) or a movable lifting/pulling sash movable on a sliding rail (16) in a joint region (15), having a receiving groove (17) provided on an upper horizontal sash beam (10) and a receiving groove (18) provided on a lower horizontal sash beam (11) and having a second sash as a supporting sash frame (8') of a supporting sash (6) or a sash or a lifting/pushing sash likewise movable as a sliding sash or a lifting/pushing sash in a protective frame (2) positioned with respect to the sliding sash (7) along a plane offset from the parallel ground surface of the protective frame (2) and further pointing to the outside of the building, wherein, when the sliding sash (7) is open, an end face (19) of a vertical sash beam (13) of the sliding sash (7) and a lateral vertical protective frame (2) of the protective frame (2) are laterally vertical Between the protective frame beams (3') on the sliding wing (7) is provided a covering element (20) which can be fastened to the sliding wing (7) by means of a fastening device (21), wherein the covering element (20) is designed as a covering plate (22) with a flat surface, which has a connecting means (24) of the fastening device (21) on a plane side (23) pointing to the end face (19) of the vertical wing beam (12), which connecting means can be detached in a form-fitting and/or force-fitting manner from a fastening part (25) of the fastening device (21) fastened to the sliding wing (7) and is effectively connected in a covering manner by the covering plate (22) after assembly, wherein the covering plate (22) covers the receiving groove (17) above the receiving hardware (14') of the upper wing beam (10) and the receiving groove (17) of the lower wing beam (11) approximately flush with the surface of the end face (19) of the vertical wing beam (13) An accommodating groove (18) below the pulley unit (14) of the push-pull wing (17).

Description

Device for covering a sliding or movable lifting/sliding wing of a window or door

Technical Field

The invention relates to a device for covering a first leaf frame of a window or door as a sliding leaf or a movable lifting/pushing leaf, which first leaf frame can be moved in an engagement region on a sliding rail, according to the preamble of claim 1.

Background

The movable leaf, which is a sliding leaf or a movable lifting/sliding leaf of a window or door, is known in various embodiments and comprises in the simplest case a leaf, which is a sliding leaf, which is arranged movably for opening and closing in an outer protective frame, and further door or window elements, such as a supporting leaf or a fastening area, which are likewise arranged in the protective frame.

The closed sliding leaf on its side facing away from the door or window element can be locked to the protective frame by actuating hardware provided in the leaf frame and thus protected against unauthorized opening. A horizontally movable push-pull wing is usually movably accommodated above or below the push-pull wing. When opening, the door is usually opened by means of a control handle of the lift-push wing, which lifts up with the seal, so that it runs more easily. The open push-pull wing can then be moved in front of the support wing lying beside it. Depending on the configuration, the lifting/pushing wing can only be moved or can also be additionally tilted. When closed, the push-pull wing is lowered and the seal is compressed again. The opening and closing can also be performed by an electric, hydraulic or pneumatic actuator.

The sealing in the vertical transition or junction area between the sliding leaf and the fastening area is usually carried out by means of a sealing strip or rib which seals in the closed position, at which the closed sliding leaf is connected to the other fastening area or to the door or window element.

In the joining region, sealing strips or ribs are known which are fastened to vertical sections of the leaf frame and of the other door or window elements, so that, when the sliding leaf is closed, the sealing strips overlap in the region of their first rib section and at the same time act behind it. In view of the sealing measures to prevent water from possibly penetrating through the lip seal due to high wind loads and rain stresses, the gap between the push-pull wing and the support wing in the vertical region of the sealing strip is closed. In contrast, in order to close the gap of the receiving groove (which is brought about by the receiving hardware) also in the joining region at the upper and lower end of the vertical wing beam of the push-pull wing, the visual effect and the assembly are ignored in the known prior art. For covering, a covering element is used, which is designed to rest firmly on the wing beam on the basis of the material thickness. Furthermore, the reason for the firm construction of the material is the counterbores for the screw fastening of the cover element on the leaf webs of the push-pull leaf. The bolt fastening is thus proved to be a visual defect, since the bolts, in particular the bolt heads, are clearly visible on the wing beam. Furthermore, the cover element is effectively molded, but cannot be configured to adapt to the present design trends. Furthermore, the cover element is screwed rigidly when the screw is tightened. The screw-on mounting and dismounting of the cover element by means of the fastening element has proven to be costly and expensive.

Such lift-push wings are known in the prior art.

DE 202008001251U1 discloses a lift-push wing according to the preamble of claim 1.

In this context, lifting/sliding doors are known with lifting/sliding wings which are guided displaceably on a rail mounted on the frame part below the frame rim by means of pulley units accommodated in the frame part below the wing frame of the lifting/sliding wing, wherein, when the lifting/sliding wing is closed, a cover element is present in the region of the joint between the lifting/sliding wing and the lateral frame part of the frame rim, which cover element is fastened in the region of the joint to the wing frame and by means of which cover element the lifting/sliding wing rests on the rail in the lowered state, wherein the cover element is formed from a base surface and a fastening part, wherein, in the region below, a recess is provided which is complementary to the contour of the pulley unit rail and, in the lowered state of the lifting/sliding wing, a section of the pulley unit track is received into the recess.

Disclosure of Invention

The invention is based on the following tasks: a functionally reliable and compact device for covering a movable wing as a sliding wing or a movable lift-push wing of a window or door is provided, which avoids the aforementioned disadvantages and has a good visual effect and low costs for the window or door and can be assembled and adjusted in a simple, quick, reliable and precise manner with a small amount of installation space.

In order to solve this object, a sliding leaf of a lifting sliding leaf of a window or door has a covering device which comprises a covering element and a fastening device which is thin-walled on the end face of the vertical leaf beam of the sliding leaf.

For this purpose, a cover element is preferably arranged on the push-pull wing between the end face of the vertical wing beam of the push-pull wing and the lateral vertical protective frame beam of the protective frame when the push-pull wing is opened, which cover element can be fixedly positioned on the push-pull wing by means of a fastening device. If the flat surface is adapted to the end face of the sash bar or of the entire window or door, the cover element has a cover plate with a flat surface, which cover, on the side of the plane facing the end face of the vertical sash bar, has the visible outer side of a connecting means of the fastening device, which can be detached in a form-fitting and/or force-fitting manner from the fastening part of the fastening device mounted on the sliding sash and is also effectively connected in a covering-fitting manner by the cover plate. Furthermore, a cover plate, which covers the hardware received in the receiving groove at the upper wing bar and the pulley unit of the push-pull wing received in the receiving groove at the lower wing bar, covers the end faces of the vertical wing bar almost flush on the surface, on the basis of a small material thickness of <2 mm.

The cover plate is preferably formed in one piece with the connecting means. For this purpose, the cover plate extends with the outer side completely visible against the end face of the vertical leaf beam of the push-pull leaf, wherein the connecting element is completely embedded in the cover plate in a covering manner in the receiving groove of the push-pull leaf and is finally fastened in an operatively connected manner to the fastening means. A more reliable fastening can be achieved by the one-piece design of the cover element and the connecting means. Furthermore, no additional effort is required for assembly by means of further mounting elements.

Such a covering device ensures a desired visual appearance of the covering plate with a cuboid basic shape and a material thickness of <2 mm. The angular configuration of the cover element is adapted to the visible mounting, for example the operating lever, and to the window or door itself, which gives the window or door a clear overall impression of a transition-free geometry and complements the design trends.

In the case of production and assembly on a window or door, it is particularly advantageous if the cover device can be fitted both to the upper receiving groove of the sliding wing and to the lower receiving groove of the sliding wing as the cover element is rotated about its own axis. The fastening device itself comprises a connecting means on the cover element and a fastening component provided as a mounting on the push-pull wing, said fastening device being of constant configuration.

With the sleeve being configured as a fastening component functionally and visually equivalent to the tongue and the connecting means of the cover element being configured as a plug, a detachable plug connection or clip connection of the fastening device is obtained in a simple manner. The connecting part is positively oriented by the form-locking of the plug and is detachably fixed by spring force in a force-locking manner. The sleeves are simply handled and quickly assembled and inserted into the prefabricated holes of the vertical wing beam of the push-pull wing. In order to achieve a non-detachable fixed placement of the sleeve in the bore, grooves or threads are introduced at least in some regions on the outer casing on the outside of the sleeve.

For the fastening, magnet solutions or further variants of clip-on connections are likewise conceivable. The solution according to the invention has the advantage over the known embodiments that, with reliable retention, it additionally also results in a simple to produce and low-cost embodiment, which is also simple to handle.

The simple and cost-effective production and functional securing of the connection of the fastening device is achieved in that the sleeve has axially parallel clips which are integrally formed by means of likewise axially parallel cutouts of the sleeve, wherein the spring-elastic clips project through the openings into the inner diameter of the bore of the sleeve with correspondingly arranged locking projections on the free ends. Furthermore, the cover element can be easily removed for possible replacement, and also ensures a secure fastening in the assembled state with the vertical leaf beam of the push-pull leaf. In order to prevent the cover element from rotating on the vertical leaf rail in the assembled state, the cover device has two fastening devices or plug-in connections arranged next to one another, which are separated by a receiving groove.

The sleeve can be centered automatically by the chamfer itself for wedging into the hole in the vertical wing bar and thus simplifies the stop. In order to achieve a precise fixing and positioning of the sleeve relative to the cover plate of the cover element, a flange is formed at the operatively connected end of the sleeve relative to the cover plate, which flange, in the installed state of the cover element in the push-pull wing, engages flush with the surface in a recess of the invisible surface of the cover plate.

The plug is preferably designed as a pin and has a chamfer on the free end, which facilitates automatic alignment when inserted into the opening of the bore of the sleeve. Dimensional inaccuracies may also occur, for example due to the manufacture of the components of the sleeve and the cover element or due to the imprecise manufacture of the holes in the push-pull wing, which dimensional inaccuracies can be compensated for by chamfering. In order to achieve the aforementioned advantages with a simple and reliable assembly, the plug is designed to be circular in cross section in the basic shape of the pin. Angular cross-sectional shapes are also possible.

A particularly effective connection and uncomplicated fastening of the covering element is achieved in that a groove rounded off is introduced toward the free end of the plug, into which groove the spring-elastic clip engages with a projecting locking projection of the sleeve, which is equivalent to the final assembly of the covering element. With the grooves chamfered on both sides, the plug and thus the cover element can be simply snapped in and removed again from the locking position. For simplicity, the locking force and removal determine the design of the angle of inclination of the chamfer in the groove.

In order to achieve the advantages described above and to be described later, the cover element is made of a plastic material, an alloy die-cast or a metal. With the same cover elements and therefore the same material selection on the end faces on the upper and lower ends of the vertical wing beam of the push-pull wing, different surfaces of the front face of the cover plate can be galvanically, powder-coated and brushed-off adapted to additionally visible components, such as the handle. The sleeve containing the function of the tenon is preferably made of a plastic material. Embodiments of metals are also contemplated and known.

Drawings

Further advantageous embodiments are shown in the drawing. In the figure:

fig. 1 shows a schematic view of a front view of a window or door from the inside of a room, with a view of a push-pull wing as a lifting-push-pull wing and a fastening area on a protective frame in the closed state and showing the engagement area of the push-pull wing and a covering element with the fastening area.

Fig. 2 shows a perspective view of the joint region of a protective frame without a fastening region frame with a sill contour and a sliding leaf with a surface offset of the corresponding device for covering, from the building exterior of a window or door.

Fig. 3 is a perspective view of the joint region of a protective frame without a fastening region frame with a sill contour and a sliding leaf according to fig. 2 with a surface offset of the corresponding device for covering, from the building exterior of a window or door, in an exploded view.

Fig. 4 shows a perspective view of the joint region from the outside of the building of the window or door, the joint region having the sliding leaf and the technical component fastened thereto for guiding the sliding leaf and the device for covering according to fig. 2.

Fig. 5 shows a perspective view of the joint area from the outside of the building of a window or door, with the push-pull wing and the device for covering according to fig. 4 without technical components.

Fig. 6 shows an enlarged exploded view of the cover device according to fig. 3, with the cover element and the fastening device with the connecting means and the fastening component.

Fig. 7 shows an enlarged exploded view of a cover device with a cover element and a fastening device with a connecting means and the fastening means of fig. 6, and also with a sleeve as the fastening means and shown in cross section; and

fig. 8 shows an enlarged exploded view of a cover device with a cover element and a fastening device with a connecting means and the fastening part of fig. 6, and with a sleeve as a fastening part in a locked fitted state with the connecting means of the cover element.

Detailed Description

The following exemplary embodiments relate to a window or door 1 having a movable lifting/pushing wing 7, which can also be designed as a pushing/pulling wing. Fig. 1 schematically shows the basic structure of a window or door 1 with a lift-push wing 7. The window or door 1 comprises an outer protective frame 2 to be placed in a building opening, which is built up from two lateral

protective frame beams

3, 3', an upper protective frame beam 4 and a lower protective frame beam 5, also called bottom beam. A push-pull wing as a lifting-push-pull wing 7 and a support wing 6 are also included, wherein the support wing 6 and the lifting-push-pull wing 7 are embedded in the protective frame 2. In the wing frame 8 and the supporting wing frame 8 '(in this embodiment of the invention wooden frames) of the lifting-pushing wing 7 or of the supporting wing 6, respectively, a mounting glass 9, 9' is inserted. Analogously to the protective frame 2, the lifting-pushing-pulling leaf 7 and the leaf frame and supporting leaf frame 8, 8' of the supporting leaf 6 are constructed from four beams each, namely two lateral, vertical leaf beams 12, 13 and supporting leaf beams 12', 13' each, an upper, horizontal leaf beam and supporting leaf beam 10, 10' each, and a lower, horizontal leaf beam and supporting leaf beam 11, 11' each. When the lift-push leaf 7 of the window or door 1 is closed, the vertical leaf beam 13 of the lift-push leaf 7 is in front of the vertical support leaf beam 13' (not shown in fig. 1) supporting the leaf 6, i.e. in the junction area of the support leaf 6 and the lift-push leaf 7, while the other vertical leaf beam 12 of the lift-push leaf 7 is next to the lateral protective frame beam 3 of the protective frame 2, i.e. in the junction area 15 between the lift-push leaf 7 and the lateral protective frame beam 3.

In other embodiments of the window or door 1, two or more lift-push wings 7 can also be placed in the protective frame 2. In order to ensure the movability of the lifting/pushing wing 7 relative to the protective frame 2 or the supporting wing 6, the lifting/pushing wing 7 and the supporting wing 6 are arranged in two different, mutually parallel planes deep in the protective frame 2. In the embodiment shown in fig. 1, the lift-push wing 7 is arranged in a plane closer to the inside of the building than the support wing 6. On the

beams

10, 11, 12 and 13 of the wooden frame 8 of the lift-push wing 7, there are accommodation grooves on the peripheral side, i.e. in the region of the connection grooves, for accommodating hardware or technical components. The lower leaf frame beam 11 of the lift-push leaf 7 has at its two lateral ends a respective pulley unit 14 with pulleys (schematically illustrated) by means of which the lift-push leaf 7 can be guided in a sliding manner on rails 16 on the lower protective frame beam 5 of the protective frame 2. The pulley units 14 are in each case accommodated in the lower accommodating groove 18 in the lower wing frame bar 11, wherein further hardware 14' (e.g. guide elements) which are functionally required for the movement of the lift-push wing 7 are arranged in the accommodating groove 17 provided in the upper wing frame bar 10. Furthermore, a lift-push fitting, not shown, is attached to the leaf frame 8 of the lift-push leaf 7, by means of which the lift-push leaf 7 is raised or lowered in the vertical direction for opening and closing and can also be closed.

Fig. 2 shows a perspective view and a detail of an embodiment of the covering device according to the invention of a covering element 20 of a window or door 1, in which the junction area 15 between a lifting/pushing leaf 7 with a vertical leaf beam 13 and a vertical supporting leaf beam 13', not shown, of a supporting leaf 6, which is offset directly behind the vertical leaf beam 13 in parallel, together with the upper protective frame beam 4 and the lower base beam 5 of the protective frame 2 is shown. According to the invention, the cover element 20 is mounted there on the end face 19 of the vertical wing beam 13 and covers the upper and lower receiving

grooves

17, 18 respectively completely with the cover plate 22.

The visible side of the cover plate 22 of fig. 2 is configured to be adapted uniformly to the end face 19 of the vertical wing beam 13. As the cover plate 22 covers the receiving

grooves

17, 18 and thus produces a convex covering on the end face 19, planarity is achieved between the plane of the flat end face 19 of the vertical wing beam 13 and the visible end face 43 of the cover plate 20, which is arranged parallel to the plane. The cover element 20 rests flush against the respective end of the vertical wing beam 13 with a precise fit.

The cover element 20 is constructed from the base surface of the cover plate 22 and the connecting means 24 of the associated fastening device 21 of fig. 3. In the illustrated embodiment of the connecting means 24 used according to the invention, the connecting means 24 is formed as a one-piece component with the cover 22. It is likewise conceivable, but not shown, that a further embodiment variant is a two-part construction of the cover plate 22 and the connecting means 24.

As shown in fig. 2 to 5, the open groove ends of the receiving

grooves

17, 18 are covered on the vertical leaf beam 13 of the sliding leaf 3 by the cover element 20, wherein the cover plate 22 is formed on the visible end face 43 without visible screwing or another fastening formation by the gap-free flat surface of the end face 43 and the basic shape of a cuboid with a material thickness of up to 2mm, the angular geometry being adapted to the angular structure of the window or door 1. The angular configuration of the cover element 20 is adapted to the visible mounting, for example the operating lever, and to the window or door 1, which gives the window or door 1 the overall impression of a clear, transition-free geometric shape of an integral structural unit.

As can be seen in fig. 4 and 5, the covering element 20 is configured to be visually identical so as to cover the

accommodating grooves

17, 18 above and below. The covering element 20 fitted in the push-pull wing 7 likewise does not make a functional difference, so that the covering element 20 can cover the upper receiving groove 17 and also the lower receiving groove 18 with the same covering element 20, with a rotation of 180 ° about its own axis.

The cover element 20 arranged on the lower wing beam 11 has a recess 44 in the cover plate 22 for the upper contour of the sliding rail 16.

With regard to the embodiment of the cover element 20 for the push-pull wing 7, the recess 44 can additionally be produced before assembly into the push-pull wing 7, for example by means of a cutting profile prefabricated at the time of manufacture, or, as shown in fig. 1, the original profile of the cover element 20 is maintained. Various prefabricated construction variants of the cover element 20 are also possible.

By the sleeve 27 as the functionally equivalent fastening means 25 of the tongue and the connection means 24 of the cover element 20 being designed as a plug 26, a detachable plug connection or clip connection of the fastening device 21 according to fig. 6 to 8 is obtained in a simple manner. For this purpose, the sleeve 27 is inserted or wedged into a preformed hole 29 according to fig. 3. In order to achieve a fixed placement of the sleeve 27 in the bore 29, grooves 28 or threads are introduced at least in some regions on the outer shell on the outside of the sleeve 27.

The solution according to the invention is distinguished by a simple production and low-cost embodiment, which is also simple to operate.

Even if not shown in the figures, a magnet solution or another variant of a clip-on connection is conceivable.

According to fig. 7, the axially parallel catches 31 of the sleeve 27 are formed in one piece by means of the likewise axially parallel cutouts 30 of the sleeve 27. The spring-elastic clip 31 projects with a corresponding locking projection 34, which projects at the free end 33, into the inner diameter 32 of the sleeve 27 and assists in the lockable connection of the fastening device 21 to the plug member 26. The cover element 20 can be easily removed for possible replacement and also ensures a secure fastening in the assembled state with the vertical wing beam 13 of the push-pull wing 7. In order to prevent the cover element 20 from rotating on the vertical leaf beam 13 in the assembled state, the cover device has two fastening devices 21 or plug-in connections arranged next to one another, which are separated by the receiving

grooves

17, 18, as shown in fig. 3.

Fig. 6 and 8 show a complementary embodiment of the sleeve 27. The sleeve 27 is shown with a chamfer 36 at the free end 35. By means of the chamfer 36, the sleeve 27 can be centered automatically for wedging into the hole 29 on the vertical wing beam 13 and thus simplifies the stop for the push-pull wing 7. In order to achieve a precise fixing and positioning of the sleeve 27 relative to the cover plate 22 of the cover element 20, a flange 38 is formed on the operatively connected end 37 of the sleeve 27 relative to the cover plate 22, said flange engaging flush in a recess 39 of the cover plate 22 according to the surface of fig. 8.

As can be seen in fig. 6 and 7, the plug part 26 is of pin-like design and has a chamfer 41 at the free end 40. The plug 26 can be connected to the sleeve 27 in an automatically calibrated manner by means of the chamfer 41. Dimensional inaccuracies may also occur, for example due to the production of the components of the sleeve 27 and the cover element 20 or due to the imprecise production of the holes 29 in the push-pull wing 7, which dimensional inaccuracies can be compensated for by the chamfers 41. Furthermore, according to fig. 6 and 7, the free end 40 facing the plug part 26 has a groove 42 which is chamfered in a circumferential manner and into which the spring-elastic clip 31 engages with the projecting locking projection 34 of the sleeve 27, according to fig. 7, and into which groove 42, according to fig. 8 and 2, 4 and 5, corresponds to the final assembly of the cover element 20. The configuration of the circumferential groove 42 on the plug 26 ensures that the plug 26 is inserted into the sleeve 27 in all positions of the plug 26 relative to the sleeve 27. By means of the grooves 42 which are chamfered on both sides, the plug part 26 and thus the cover element 20 can be simply snapped in and removed again from the locking position. For simplicity, the locking force and removal can be controlled by designing the angle of inclination of the chamfer in the groove 42.

Fig. 3 shows the direction of assembly of the covering element 20 with the plug 26 and the sleeve 27 in the axial direction in the direction of the arrow, which also enables the previously mentioned formation of the chamfered groove 42 on the plug 26 to move axially relative to one another. With the sleeve 27 fitted in the bore 29 of the push-pull wing, the cover element 20 is then lockingly inserted into the sleeve 27.

The invention has been described above with reference to a window or door 1 having a lift-push wing 7. However, it is clear to the person skilled in the art that these embodiments can be transferred in the same way to a corresponding window or door 1 with a sliding wing.

List of reference numerals

1 window or door

2 protective frame

3 protective frame beam

3' protective frame beam

4 protective frame beam

5 protective frame Beam/sill

6 support wing

7 sliding wing/lifting-sliding wing

8 wing frame

8' support wing frame

9 mounting glass

9' mounting glass

10 wing beam, upper side

10' wing beam, above

11 wing beam, below

11' supporting the wing beam, below

12 wing beam, lateral

12' supporting wing beam, lateral

13 wing beam, lateral

13' supporting wing beam, lateral

14 pulley unit

14' hardware

15 bonding area

16 sliding rail

17 accommodating tank, above

18 accommodating tank, above

19 end face

20 cover element

21 fastening device

22 cover plate

23 side surface

24 connecting device

25 fastening part

26 plug member

27 sleeve

28 groove pattern

29 holes

30 cuts

31 clip

32 inner diameter

33 end portion

34 locking projection

35 end of

36 chamfering

37 end portion

38 flange

39 recess

40 end of the tube

41 chamfering

42 groove

43 end face

44 recess

Claims

1. Device for covering a first leaf frame (8) which can be moved in a joint region (15) on a sliding rail (16) and which serves as a sliding leaf (7) or a movable lifting-sliding leaf of a window or door (1), having a receiving groove (17) provided on an upper horizontal leaf beam (10) and a receiving groove (18) provided on a lower horizontal leaf beam (11), and having a second leaf which is positioned relative to the sliding leaf (7) along a plane which is offset from the parallel ground surface of the protective frame (2) and which is further directed to the outside of the building, or a likewise movable leaf which serves as a supporting leaf frame (8') supporting the leaf (6), and which serves as a sliding leaf or lifting-sliding leaf in the protective frame (2), wherein, when the sliding wing (7) is opened, a covering element (20) is arranged on the sliding wing (7) between an end face (19) of a vertical wing beam (13) of the sliding wing (7) and a lateral vertical protective frame beam (3') of the protective frame (2), said covering element being fastenable to the sliding wing (7) by means of a fastening device (21),

it is characterized in that the preparation method is characterized in that,

the covering element (20) is designed as a covering plate (22) with a flat surface, which has, on a plane side (23), a connecting means (24) of the fastening device (21) pointing to the end face (19) of the upright wing beam (12), which connecting means is detachably connected in a form-fitting and/or force-fitting manner to a fastening part (25) of the fastening device (21) fastened to the sliding wing (7) and is effectively connected in a covering manner after assembly by the covering plate (22), wherein the covering plate (22) covers, approximately flush with the surface, the upper receiving groove (17) of the upper wing beam (10) which receives the fitting (14') and the lower receiving groove (18) of the lower wing beam (11) which receives the pulley unit (14) of the sliding wing (17), in a bearing manner against the end face (19) of the upright wing beam (13).

2. Covering device according to claim 1,

the cover (22) and the connecting means (24) are designed in one piece.

3. Covering device according to claim 1,

the cover (22) is designed in the basic shape of a cuboid and has a material thickness of <2 mm.

4. Covering device according to claim 1,

the covering device, including the covering element (20) and the fastening device (21), can cover the upper receiving groove (17) and the lower receiving groove (18) of the push-pull wing (7) as the covering element (20) rotates about its own axis.

5. Covering device according to claim 1,

the fastening device (21) is a plug connection, wherein the connecting means (24) of the cover element (20) is designed as a plug (26) and the fastening component (25) fastened to the vertical wing beam (13) is a sleeve (27).

6. Covering device according to claim 5,

the sleeve (27) has grooves (28) or a thread on the outside at least in some regions and can be wedged into a bore (29) provided on the end face (19) of the vertical wing beam (13).

7. The covering device as claimed in claim 5,

it is characterized in that the preparation method is characterized in that,

the sleeve (27) is divided into two spring-elastic clips (31) by axially parallel cutouts (30), which protrude into the inner diameter (32) of the sleeve (27) by means of locking projections (34) arranged on the free ends (33).

8. The covering device as claimed in claim 5,

it is characterized in that the preparation method is characterized in that,

the sleeve (27) has a chamfer (36) at one end (35) and a flange (38) at the other end (37), said flange engaging flush with a recess (39) of the cover (22).

9. The covering device as claimed in claim 5,

it is characterized in that the preparation method is characterized in that,

the plug (26) is of a plug-like design and has a chamfer (41) on the free end (40) and a groove (42) surrounding the chamfer is introduced toward the free end (40).

10. Covering device according to one or more of the preceding claims 1 to 9,

the plug (26) and the sleeve (27) are axially displaceable relative to one another, and the spring-elastic catch (31) of the sleeve (27) engages in a locking manner in a circumferential groove (42) of the plug (26) as the cover element (20) is fastened to the vertical leaf beam (13) of the push-pull leaf (7).

11. Covering device according to claim 1,

the cover element (20) is made of a plastic material, an alloy die casting or a metal and the sleeve (27) is preferably made of a plastic material.